[NI] Look for type variables in captured flexible types

#KT-32434 Fixed

compiler/testData/diagnostics/tests/inference/kt32434.kt

@@ -0,0 +1,32 @@
+// FULL_JDK
+// !WITH_NEW_INFERENCE
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+// Issue: KT-32434
+
+// FILE: CacheMonoJava.java
+
+public class CacheMonoJava {
+    public static <K, V> Mono<V> lookup(java.util.Map<K, ? super Signal<? extends V>> map, K key) {
+        throw new UnsupportedOperationException();
+    }
+}
+
+// FILE: main.kt
+
+interface Cache<K, V> {
+    fun asMap(): MutableMap<K, V>
+}
+
+interface Mono<E>
+interface Signal<E> : Mono<E>
+
+interface AttributeDefinition
+
+val cache: Cache<String, Signal<out AttributeDefinition>> = TODO()
+
+object CacheMonoKotlin {
+    fun <K, V> lookup(map: MutableMap<K, in Signal<out V>>, key: K): Mono<V> = TODO()
+}
+
+fun findByName_java(name: String): Mono<AttributeDefinition> = CacheMonoJava.lookup(cache.asMap(), name)
+fun findByName_kotlin(name: String): Mono<AttributeDefinition> = CacheMonoKotlin.lookup(cache.asMap(), name)